Metallic vehicle-wheel.



IVI. B. GIBERSLLN.

METALLIC VEHICLE WHEEL.

APPLICATION FLLED APR.8.19I5.

LLL' PELLE-Mod Apr. 25, 1916.

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llltttlllll' 1B. GBERSON, 0l? DETIEtT, MItCHIGAN, ASSGNOR TO THONIAS H. SItMPSG'l, ll

` DETROIT, lVIllCI-GAN.

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.To all 'whom t may concern:

Be it known that l, MAsoN lB. Glrnson, a citizen ot the United States ot America, residing at Detroit, in the county ot Wayne and State ot Michigan, have invented certain new and usetul improvements in Metallic Vehicle-Wheels, ot which the tollowing is a specification, reference being had therein to the accompanying drawings.

The invention relates to metallic vehicle wheels, and it is the object ot the invention to obtain a construction which may be tormed ot malleable cast iron.

To this end the invention comprises the construction and method ot forming the same as hereinafter set torth.

ln the drawings: Figure l is a sectional side elevation ot the wheel; and ligf@ is a transverse section.

My improvement is more particularly de signed tor use on motor trucks and other vehicles designed tor carrying relatively heavy loads. For this purpose the wheel comprises essentially a hub, a rim or telly and connecting spokes,-all cast integral. There is, however, a difficulty involved in the construction due to the unequal rate ot cooling ot the hub and peripheral portion ot the wheel, which results in unequal shrinkage and the overstressing ot the spokes. "lhus the spokes are trequently broken in the casting process, and also in the subsequent annealing process there is great danger ot warping or distortion in shape. l have overcome these ditliculties by the peculiar distribution ot the metal so as to compensate tor the unequal rates ot cooling and to produce a unitormshrinkage in all portions ot the structure.

ln detail, A is the hub which has the barrel portion B and central hollow Harige C.

D is the rim or telly ot an outwardlyopening channel torm and preterably provided with side and central ianges D D2 and D3.

lE are hollow spokes which `connect the hollow dange portion. C lot thehulo with the channel rim D, andfwhich in outward contour are substantially ot the usual shape Specification of Letters Patent.

.application filed April 8, 1915.

Fatented dpr. 25, lult.,

Serial No. 20,607.

ot wooden spokes, tapering slightly trom the hub to the rim.

To compensate tor the more rapid cooling ot the peripheral portion, the walls ot the channel D are tormed ot heavier gage than the walls ot the hub A, so that there is a greater mass ot metal in relation to the er;-

posed radiating surtace. By properly proand a rim or telly portion ot outwardlyy opening channel section, all ot said portions being cast integral, the walls ot said rim or telly portion being ot greater thickness than the walls ot said hub portion, and the walls ot said spokes being ot increasing thickness trom hub to rim to compensate tor unequal rate ot heat dissipationo 2. l metallic vehicle wheel, comprising a hub having a barrel portion and a hollow central flange portion, a rim or telly portion ot an outwardly-opening channel sec.- tion having also a central flange, and radial hollow spoke portions intermediate said hub and telly or rim, all otsaid portions being cast integral, and the thickness ot the walls being progressively increased trom hub 'to periphery to compensate tor unequal rates ot heat dissipation.

3. A metallic vehicle wheel, comprising a hub portion, hollow radial spoke portions and a rim portion, the walls ot said spoke portions being ot increasing thickness trom the hub portion to the rim portion to compensate tor unequal rates ot dissipation ot heat.

4h A metallic vehicle wheel, comprising a hub portion, hollow radial spoke portions and a rim portion, the Walls of said rim In testimony whereof I ailix my signature portion being of greater thickness than the in presence of two witnesses. Y walls of said hub portion, and the walls of said spoke portions being of increasing 5 thickness from the hub portion to the rim Witnesses:

portion to compensate for unequal rute of JAMES I). BARRY, heut dissipation. ARTHUR AD. PULVER. l

MASON B. GIBERSON. 

